September Weather in Brush, United States

Last updated: June 24, 2025

In Brush, United States, the average temperature in September hovers around 21°C (69°F). However, temperatures can swing dramatically, dipping as low as 1°C (34°F) and peaking at a scorching 39°C (102°F). Expect about 24 mm (0.9 in) of precipitation spread over 3 days, coupled with an average humidity of 75%.

September Temperature in Brush

In September in Brush, the average temperature is 21°C (69°F), with maximums reaching as high as 39°C (102°F) and minimums dropping to 1°C (34°F). It's advisable to pack layers and stay hydrated while enjoying a diverse range of outdoor activities.

September Weather in Brush: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Brush, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Brush, September typically has an average temperature of 21°C (69°F), with highs reaching up to 39°C (102°F) and lows dropping to around 1°C (34°F).

Data source: Temperature data for Brush generated using information from the Copernicus Climate Change Service.

September Precipitation in Brush

In Brush in September, the precipitation amount is 24 mm (0.9 in) over a span of 3 days.

September Precipitation Trends in Brush

The chart displays monthly precipitation patterns in Brush, with values for each month alongside September’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how September’s conditions compare to those of other months. In Brush, September typically receives around 24 mm (0.9 inches) of precipitation spread over approximately 3 days.

Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

September Humidity in Brush

In Brush in September, humidity is 75%. With an average temperature of 21°C (69°F), this humidity feels like a warm, sticky embrace that can make even a short walk feel exhausting for travelers, often leading to a longing for refreshing breezes or air-conditioned retreats.

September Average Humidity in Brush

This chart illustrates the average monthly humidity levels in Brush, with September’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In September, average humidity in Brush is approximately 75%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Brush

In Brush in September, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in Brush.

Maximum UV Index Levels in Brush for September

The chart shows the monthly maximum UV Index (UVI) for Brush in September, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In September, the maximum UV index in Brush typically reaches 9, which falls under the very high exposure category.

Data source: Brush September UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

Extreme (11+): Avoid the sun, stay in shade.
Very High (8-10): Limit sun exposure.
High (6-7): Use SPF 30+ and protective clothing.
Moderate (3-5): Midday shade recommended.
Low (0-2): No protection needed.

How September Weather in Brush Compares to Other Months

Weather in Brush varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Brush, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Brush, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	0°C (33°F)	11 mm (0.4 inches)	72%	moderate
February Weather	0°C (32°F)	13 mm (0.5 inches)	76%	moderate
March Weather	7°C (44°F)	54 mm (2.1 inches)	61%	high
April Weather	10°C (51°F)	47 mm (1.9 inches)	60%	very high
May Weather	15°C (60°F)	91 mm (3.6 inches)	74%	very high
June Weather	23°C (73°F)	43 mm (1.7 inches)	82%	extreme
July Weather	25°C (78°F)	35 mm (1.4 inches)	82%	extreme
August Weather	24°C (75°F)	32 mm (1.3 inches)	84%	very high
September Weather	21°C (69°F)	24 mm (0.9 inches)	75%	very high
October Weather	10°C (51°F)	25 mm (1.0 inches)	73%	high
November Weather	6°C (43°F)	15 mm (0.6 inches)	74%	moderate
December Weather	1°C (35°F)	9 mm (0.4 inches)	77%	moderate